| /* |
| * Copyright (c) 2001 |
| * Fortress Technologies, Inc. All rights reserved. |
| * Charlie Lenahan (clenahan@fortresstech.com) |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that: (1) source code distributions |
| * retain the above copyright notice and this paragraph in its entirety, (2) |
| * distributions including binary code include the above copyright notice and |
| * this paragraph in its entirety in the documentation or other materials |
| * provided with the distribution, and (3) all advertising materials mentioning |
| * features or use of this software display the following acknowledgement: |
| * ``This product includes software developed by the University of California, |
| * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| * the University nor the names of its contributors may be used to endorse |
| * or promote products derived from this software without specific prior |
| * written permission. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| |
| #ifndef lint |
| static const char rcsid[] = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-802_11.c,v 1.6 2001-09-17 21:57:53 fenner Exp $ (LBL)"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <sys/param.h> |
| #include <sys/time.h> |
| #include <sys/socket.h> |
| |
| #include <netinet/in.h> |
| |
| #include <stdio.h> |
| #include <pcap.h> |
| #include <string.h> |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| #include "ethertype.h" |
| |
| #include "extract.h" |
| |
| #include "ieee802_11.h" |
| |
| #define RATEStoBUF(p, buf) \ |
| do { \ |
| int z = 0; \ |
| for (z = 0 ; z < p.rates.length ; z++) \ |
| snprintf(buf, sizeof(buf), "%s %2.1f", buf, (.5 * (p.rates.rate[z] & 0x7f))); \ |
| } while (0) |
| |
| static const char *auth_alg_text[]={"Open System","Shared Key","EAP"}; |
| static const char *subtype_text[]={ |
| "Assoc Request", |
| "Assoc Response", |
| "ReAssoc Request", |
| "ReAssoc Response", |
| "Probe Request", |
| "Probe Response", |
| "RESERVED", |
| "RESERVED", |
| "Beacon", |
| "ATIM", |
| "Disassociation", |
| "Authentication", |
| "DeAuthentication", |
| "RESERVED", |
| "RESERVED" |
| }; |
| |
| static const char *status_text[] = { |
| "Succesful", /* 0 */ |
| "Unspecified failure", /* 1 */ |
| "Reserved", /* 2 */ |
| "Reserved", /* 3 */ |
| "Reserved", /* 4 */ |
| "Reserved", /* 5 */ |
| "Reserved", /* 6 */ |
| "Reserved", /* 7 */ |
| "Reserved", /* 8 */ |
| "Reserved", /* 9 */ |
| "Cannot Support all requested capabilities in the Capability Information field", /* 10 */ |
| "Reassociation denied due to inability to confirm that association exists", /* 11 */ |
| "Association denied due to reason outside the scope of the standard", /* 12 */ |
| "Responding station does not support the specified authentication algorithm ", /* 13 */ |
| "Received an Authentication frame with authentication transaction " \ |
| "sequence number out of expected sequence", /* 14 */ |
| "Authentication rejected because of challenge failure", /* 15 */ |
| "Authentication rejected due to timeout waiting for next frame in sequence", /* 16 */ |
| "Association denied because AP is unable to handle additional associated stations", /* 17 */ |
| "Association denied due to requesting station not supporting all of the " \ |
| "data rates in BSSBasicRateSet parameter", /* 18 */ |
| NULL |
| }; |
| |
| static const char *reason_text[] = { |
| "Reserved", /* 0 */ |
| "Unspecified reason", /* 1 */ |
| "Previous authentication no longer valid", /* 2 */ |
| "Deauthenticated because sending station is leaving (or has left) IBSS or ESS", /* 3 */ |
| "Disassociated due to inactivity", /* 4 */ |
| "Disassociated because AP is unable to handle all currently associated stations", /* 5 */ |
| "Class 2 frame receivedfrom nonauthenticated station", /* 6 */ |
| "Class 3 frame received from nonassociated station", /* 7 */ |
| "Disassociated because sending station is leaving (or has left) BSS", /* 8 */ |
| "Station requesting (re)association is not authenticated with responding station", /* 9 */ |
| NULL |
| }; |
| |
| static int wep_print(const u_char *p,u_int length) |
| { |
| u_int32_t iv; |
| |
| if (!TTEST2(*p, 4)) |
| return 0; |
| iv = EXTRACT_LE_32BITS(p); |
| |
| printf("Data IV:%3x Pad %x KeyID %x", IV_IV(iv), IV_PAD(iv), |
| IV_KEYID(iv)); |
| |
| return 1; |
| } |
| |
| |
| static int parse_elements(struct mgmt_body_t *pbody,const u_char *p,int offset) |
| { |
| for (;;) { |
| if (!TTEST2(*(p + offset), 1)) |
| return 0; |
| if (*(p + offset) == 0xff) |
| break; |
| switch (*(p + offset)) { |
| case E_SSID: |
| if (!TTEST2(*(p+offset), 2)) |
| return 0; |
| memcpy(&(pbody->ssid),p+offset,2); offset += 2; |
| if (pbody->ssid.length > 0) |
| { |
| if (!TTEST2(*(p+offset), pbody->ssid.length)) |
| return 0; |
| memcpy(&(pbody->ssid.ssid),p+offset,pbody->ssid.length); offset += pbody->ssid.length; |
| pbody->ssid.ssid[pbody->ssid.length]='\0'; |
| } |
| break; |
| case E_CHALLENGE: |
| if (!TTEST2(*(p+offset), 2)) |
| return 0; |
| memcpy(&(pbody->challenge),p+offset,2); offset += 2; |
| if (pbody->challenge.length > 0) |
| { |
| if (!TTEST2(*(p+offset), pbody->challenge.length)) |
| return 0; |
| memcpy(&(pbody->challenge.text),p+offset,pbody->challenge.length); offset += pbody->challenge.length; |
| pbody->challenge.text[pbody->challenge.length]='\0'; |
| } |
| break; |
| case E_RATES: |
| if (!TTEST2(*(p+offset), 2)) |
| return 0; |
| memcpy(&(pbody->rates),p+offset,2); offset += 2; |
| if (pbody->rates.length > 0) { |
| if (!TTEST2(*(p+offset), pbody->rates.length)) |
| return 0; |
| memcpy(&(pbody->rates.rate),p+offset,pbody->rates.length); offset += pbody->rates.length; |
| } |
| break; |
| case E_DS: |
| if (!TTEST2(*(p+offset), 3)) |
| return 0; |
| memcpy(&(pbody->ds),p+offset,3); offset +=3; |
| break; |
| case E_CF: |
| if (!TTEST2(*(p+offset), 8)) |
| return 0; |
| memcpy(&(pbody->cf),p+offset,8); offset +=8; |
| break; |
| case E_TIM: |
| if (!TTEST2(*(p+offset), 2)) |
| return 0; |
| memcpy(&(pbody->tim),p+offset,2); offset +=2; |
| if (!TTEST2(*(p+offset), 3)) |
| return 0; |
| memcpy(&(pbody->tim.count),p+offset,3); offset +=3; |
| |
| if ((pbody->tim.length -3) > 0) |
| { |
| if (!TTEST2(*(p+offset), pbody->tim.length -3)) |
| return 0; |
| memcpy((pbody->tim.bitmap),p+(pbody->tim.length -3),(pbody->tim.length -3)); |
| offset += pbody->tim.length -3; |
| } |
| |
| break; |
| default: |
| #if 0 |
| printf("(1) unhandled element_id (%d) ", *(p+offset) ); |
| #endif |
| offset+= *(p+offset+1) + 2; |
| break; |
| } |
| } |
| return 1; |
| } |
| |
| /********************************************************************************* |
| * Print Handle functions for the management frame types |
| *********************************************************************************/ |
| |
| static int handle_beacon(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| struct mgmt_body_t pbody; |
| int offset = 0; |
| char buf[128]; |
| |
| memset(buf, 0, sizeof(buf)); |
| memset(&pbody, 0, sizeof(pbody)); |
| |
| if (!TTEST2(*p, 12)) |
| return 0; |
| memcpy(&pbody.timestamp, p, 8); |
| offset += 8; |
| pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset); |
| offset += 2; |
| pbody.capability_info = EXTRACT_LE_16BITS(p+offset); |
| offset += 2; |
| |
| if (!parse_elements(&pbody,p,offset)) |
| return 0; |
| |
| RATEStoBUF(pbody, buf); |
| |
| printf("%s (%s) [%s Mbit] %s CH: %x %s", |
| subtype_text[FC_SUBTYPE(fc)], pbody.ssid.ssid, buf, |
| CAPABILITY_ESS(pbody.capability_info) ? "ESS" : "IBSS", |
| pbody.ds.channel, |
| CAPABILITY_PRIVACY(pbody.capability_info) ? ", PRIVACY" : "" ); |
| |
| return 1; |
| } |
| |
| static int handle_assoc_request(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| struct mgmt_body_t pbody; |
| int offset = 0; |
| char buf[128]; |
| |
| memset(buf, 0, sizeof(buf)); |
| memset(&pbody, 0, sizeof(pbody)); |
| |
| if (!TTEST2(*p, 4)) |
| return 0; |
| pbody.capability_info = EXTRACT_LE_16BITS(p); |
| offset += 2; |
| pbody.listen_interval = EXTRACT_LE_16BITS(p+offset); |
| offset += 2; |
| |
| if (!parse_elements(&pbody,p,offset)) |
| return 0; |
| |
| RATEStoBUF(pbody,buf); |
| |
| printf("%s (%s) [%s Mbit] ", |
| subtype_text[FC_SUBTYPE(fc)], pbody.ssid.ssid,buf); |
| return 1; |
| } |
| |
| static int handle_assoc_response(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| struct mgmt_body_t pbody; |
| int offset = 0; |
| |
| memset(&pbody, 0, sizeof(pbody)); |
| |
| if (!TTEST2(*p, 6)) |
| return 0; |
| pbody.capability_info = EXTRACT_LE_16BITS(p); |
| offset += 2; |
| pbody.status_code = EXTRACT_LE_16BITS(p+offset); |
| offset += 2; |
| pbody.aid = EXTRACT_LE_16BITS(p+offset); |
| offset += 2; |
| |
| if (!parse_elements(&pbody,p,offset)) |
| return 0; |
| |
| printf("%s AID(%x) :%s: %s ", subtype_text[FC_SUBTYPE(fc)], |
| ((u_int16_t)(pbody.aid << 2 )) >> 2 , |
| CAPABILITY_PRIVACY(pbody.capability_info) ? " PRIVACY " : "", |
| (pbody.status_code < 19 ? status_text[pbody.status_code] : "n/a")); |
| |
| return 1; |
| } |
| |
| |
| static int handle_reassoc_request(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| struct mgmt_body_t pbody; |
| int offset = 0; |
| |
| memset(&pbody, 0, sizeof(pbody)); |
| |
| if (!TTEST2(*p, 10)) |
| return 0; |
| pbody.capability_info = EXTRACT_LE_16BITS(p); |
| offset += 2; |
| pbody.listen_interval = EXTRACT_LE_16BITS(p+offset); |
| offset += 2; |
| memcpy(&pbody.ap,p+offset,6); |
| offset += 6; |
| |
| if (!parse_elements(&pbody,p,offset)) |
| return 0; |
| |
| printf("%s (%s) AP : %s",subtype_text[FC_SUBTYPE(fc)], pbody.ssid.ssid, etheraddr_string( pbody.ap )); |
| |
| return 1; |
| } |
| |
| static int handle_reassoc_response(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| /* Same as a Association Reponse */ |
| return handle_assoc_response(fc,pmh,p); |
| } |
| |
| static int handle_probe_request(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| struct mgmt_body_t pbody; |
| int offset = 0; |
| char buf[128]; |
| |
| memset(buf, 0, sizeof(buf)); |
| |
| memset(&pbody, 0, sizeof(pbody)); |
| |
| if (!parse_elements(&pbody, p, offset)) |
| return 0; |
| |
| RATEStoBUF(pbody, buf); |
| |
| printf("%s (%s) [%s Mbit] ", subtype_text[FC_SUBTYPE(fc)], |
| pbody.ssid.ssid,buf); |
| |
| return 1; |
| } |
| |
| static int handle_probe_response(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| struct mgmt_body_t pbody; |
| int offset = 0; |
| char buf[128]; |
| |
| memset(buf, 0, sizeof(buf)); |
| |
| memset(&pbody, 0, sizeof(pbody)); |
| |
| if (!TTEST2(*p, 12)) |
| return 0; |
| memcpy(&pbody.timestamp,p,8); |
| offset += 8; |
| pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset); |
| offset += 2; |
| pbody.capability_info = EXTRACT_LE_16BITS(p+offset); |
| offset += 2; |
| |
| if (!parse_elements(&pbody, p, offset)) |
| return 0; |
| |
| printf("%s (%s) CH: %x %s", subtype_text[FC_SUBTYPE(fc)], pbody.ssid.ssid,pbody.ds.channel, |
| CAPABILITY_PRIVACY(pbody.capability_info) ? ",PRIVACY " : "" ); |
| |
| return 1; |
| } |
| |
| static int handle_atim(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| /* the frame body for ATIM is null. */ |
| printf("ATIM"); |
| return 1; |
| } |
| |
| static int handle_disassoc(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| struct mgmt_body_t pbody; |
| int offset = 0; |
| |
| memset(&pbody, 0, sizeof(pbody)); |
| |
| if (!TTEST2(*p, 2)) |
| return 0; |
| pbody.reason_code = EXTRACT_LE_16BITS(p); |
| offset += 2; |
| |
| printf("%s: %s ", subtype_text[FC_SUBTYPE(fc)], |
| pbody.reason_code < 10 ? reason_text[pbody.reason_code] : "Reserved" ); |
| |
| return 1; |
| } |
| |
| static int handle_auth(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| struct mgmt_body_t pbody; |
| int offset = 0; |
| |
| memset(&pbody, 0, sizeof(pbody)); |
| |
| if (!TTEST2(*p, 6)) |
| return 0; |
| pbody.auth_alg = EXTRACT_LE_16BITS(p); |
| offset += 2; |
| pbody.auth_trans_seq_num = EXTRACT_LE_16BITS(p + offset); |
| offset += 2; |
| pbody.status_code = EXTRACT_LE_16BITS(p + offset); |
| offset += 2; |
| |
| if (!parse_elements(&pbody,p,offset)) |
| return 0; |
| |
| if ((pbody.auth_alg == 1) && |
| ((pbody.auth_trans_seq_num == 2) || (pbody.auth_trans_seq_num == 3))) { |
| printf("%s (%s)-%x [Challenge Text] %s", |
| subtype_text[FC_SUBTYPE(fc)], |
| pbody.auth_alg < 4 ? auth_alg_text[pbody.auth_alg] : "Reserved" , |
| pbody.auth_trans_seq_num, |
| ((pbody.auth_trans_seq_num % 2) ? |
| (pbody.status_code < 19 ? status_text[pbody.status_code] : "n/a") : "" )); |
| } else { |
| printf("%s (%s)-%x: %s", |
| subtype_text[FC_SUBTYPE(fc)], |
| pbody.auth_alg < 4 ? auth_alg_text[pbody.auth_alg] : "Reserved" , |
| pbody.auth_trans_seq_num, |
| ((pbody.auth_trans_seq_num % 2) ? (pbody.status_code < 19 ? status_text[pbody.status_code] : "n/a") : "")); |
| } |
| |
| return 1; |
| } |
| |
| static int handle_deauth(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p) |
| { |
| struct mgmt_body_t pbody; |
| int offset = 0; |
| |
| memset(&pbody, 0, sizeof(pbody)); |
| |
| if (!TTEST2(*p, 2)) |
| return 0; |
| pbody.reason_code = EXTRACT_LE_16BITS(p); |
| offset += 2; |
| |
| if (eflag) { |
| printf("%s: %s", |
| subtype_text[FC_SUBTYPE(fc)], |
| pbody.reason_code < 10 ? reason_text[pbody.reason_code] : "Reserved" ); |
| } else { |
| printf("%s (%s): %s", |
| subtype_text[FC_SUBTYPE(fc)], etheraddr_string(pmh->sa), |
| pbody.reason_code < 10 ? reason_text[pbody.reason_code] : "Reserved" ); |
| } |
| |
| return 1; |
| } |
| |
| |
| /********************************************************************************* |
| * Print Body funcs |
| *********************************************************************************/ |
| |
| |
| static int mgmt_body_print(u_int16_t fc, const struct mgmt_header_t *pmh, |
| const u_char *p, u_int length) |
| { |
| switch (FC_SUBTYPE(fc)) { |
| case ST_ASSOC_REQUEST: |
| return (handle_assoc_request(fc, pmh, p)); |
| case ST_ASSOC_RESPONSE: |
| return (handle_assoc_response(fc, pmh, p)); |
| case ST_REASSOC_REQUEST: |
| return (handle_reassoc_request(fc, pmh, p)); |
| case ST_REASSOC_RESPONSE: |
| return (handle_reassoc_response(fc, pmh, p)); |
| case ST_PROBE_REQUEST: |
| return (handle_probe_request(fc, pmh, p)); |
| case ST_PROBE_RESPONSE: |
| return (handle_probe_response(fc, pmh, p)); |
| case ST_BEACON: |
| return (handle_beacon(fc, pmh, p)); |
| case ST_ATIM: |
| return (handle_atim(fc, pmh, p)); |
| case ST_DISASSOC: |
| return (handle_disassoc(fc, pmh, p)); |
| case ST_AUTH: |
| if (!TTEST2(*p, 3)) |
| return 0; |
| if ((p[0] == 0 ) && (p[1] == 0) && (p[2] == 0)) { |
| printf("Authentication (Shared-Key)-3 "); |
| return (wep_print(p, length)); |
| } |
| else |
| return (handle_auth(fc, pmh, p)); |
| case ST_DEAUTH: |
| return (handle_deauth(fc, pmh, p)); |
| break; |
| default: |
| printf("Unhandled Managment subtype(%x)", |
| FC_SUBTYPE(fc)); |
| return 1; |
| } |
| } |
| |
| |
| /********************************************************************************* |
| * Handles printing all the control frame types |
| *********************************************************************************/ |
| |
| static int ctrl_body_print(u_int16_t fc,const u_char *p, u_int length) |
| { |
| switch (FC_SUBTYPE(fc)) { |
| case CTRL_PS_POLL: |
| if (!TTEST2(*p, CTRL_PS_POLL_LEN)) |
| return 0; |
| printf("Power Save-Poll AID(%x)", |
| EXTRACT_LE_16BITS(&(((const struct ctrl_ps_poll_t *)p)->aid))); |
| break; |
| case CTRL_RTS: |
| if (!TTEST2(*p, CTRL_RTS_LEN)) |
| return 0; |
| if (eflag) |
| printf("Request-To-Send"); |
| else |
| printf("Request-To-Send TA:%s ", |
| etheraddr_string(((const struct ctrl_rts_t *)p)->ta)); |
| break; |
| case CTRL_CTS: |
| if (!TTEST2(*p, CTRL_CTS_LEN)) |
| return 0; |
| if (eflag) |
| printf("Clear-To-Send"); |
| else |
| printf("Clear-To-Send RA:%s ", |
| etheraddr_string(((const struct ctrl_cts_t *)p)->ra)); |
| break; |
| case CTRL_ACK: |
| if (!TTEST2(*p, CTRL_ACK_LEN)) |
| return 0; |
| if (eflag) |
| printf("Acknowledgment"); |
| else |
| printf("Acknowledgment RA:%s ", |
| etheraddr_string(((const struct ctrl_ack_t *)p)->ra)); |
| break; |
| case CTRL_CF_END: |
| if (!TTEST2(*p, CTRL_END_LEN)) |
| return 0; |
| if (eflag) |
| printf("CF-End"); |
| else |
| printf("CF-End RA:%s ", |
| etheraddr_string(((const struct ctrl_end_t *)p)->ra)); |
| break; |
| case CTRL_END_ACK: |
| if (!TTEST2(*p, CTRL_END_ACK_LEN)) |
| return 0; |
| if (eflag) |
| printf("CF-End+CF-Ack"); |
| else |
| printf("CF-End+CF-Ack RA:%s ", |
| etheraddr_string(((const struct ctrl_end_ack_t *)p)->ra)); |
| break; |
| default: |
| printf("(B) Unknown Ctrl Subtype"); |
| } |
| return 1; |
| } |
| |
| |
| |
| /* |
| * Print Header funcs |
| */ |
| |
| /* |
| * Data Frame - Address field contents |
| * |
| * To Ds | From DS | Addr 1 | Addr 2 | Addr 3 | Addr 4 |
| * 0 | 0 | DA | SA | BSSID | n/a |
| * 0 | 1 | DA | BSSID | SA | n/a |
| * 1 | 0 | BSSID | SA | DA | n/a |
| * 1 | 1 | RA | TA | DA | SA |
| */ |
| |
| static void data_header_print(u_int16_t fc,const u_char *p, u_int length) |
| { |
| #define ADDR1 (p + 4) |
| #define ADDR2 (p + 10) |
| #define ADDR3 (p + 16) |
| #define ADDR4 (p + 24) |
| |
| if (!FC_TO_DS(fc)) { |
| if (!FC_FROM_DS(fc)) |
| printf("DA:%s SA:%s BSSID:%s ", |
| etheraddr_string(ADDR1), etheraddr_string(ADDR2), |
| etheraddr_string(ADDR3)); |
| else |
| printf("DA:%s BSSID:%s SA:%s ", |
| etheraddr_string(ADDR1), etheraddr_string(ADDR2), |
| etheraddr_string(ADDR3)); |
| } else { |
| if (!FC_FROM_DS(fc)) |
| printf("BSSID:%s SA:%s DA:%s ", |
| etheraddr_string(ADDR1), etheraddr_string(ADDR2), |
| etheraddr_string(ADDR3)); |
| else |
| printf("RA:%s TA:%s DA:%s SA:%s ", |
| etheraddr_string(ADDR1), etheraddr_string(ADDR2), |
| etheraddr_string(ADDR3), etheraddr_string(ADDR4)); |
| } |
| |
| #undef ADDR1 |
| #undef ADDR2 |
| #undef ADDR3 |
| #undef ADDR4 |
| } |
| |
| |
| static void mgmt_header_print(const u_char *p, u_int length) |
| { |
| const struct mgmt_header_t *hp = (const struct mgmt_header_t *) p; |
| |
| printf("BSSID:%s DA:%s SA:%s ", |
| etheraddr_string((hp)->bssid), etheraddr_string((hp)->da), |
| etheraddr_string((hp)->sa)); |
| } |
| |
| static void ctrl_header_print(u_int16_t fc,const u_char *p, u_int length) |
| { |
| switch (FC_SUBTYPE(fc)) { |
| case CTRL_PS_POLL: |
| printf("BSSID:%s TA:%s ", |
| etheraddr_string(((const struct ctrl_ps_poll_t *)p)->bssid), |
| etheraddr_string(((const struct ctrl_ps_poll_t *)p)->ta)); |
| break; |
| case CTRL_RTS: |
| printf("RA:%s TA:%s ", |
| etheraddr_string(((const struct ctrl_rts_t *)p)->ra), |
| etheraddr_string(((const struct ctrl_rts_t *)p)->ta)); |
| break; |
| case CTRL_CTS: |
| printf("RA:%s ", |
| etheraddr_string(((const struct ctrl_cts_t *)p)->ra)); |
| break; |
| case CTRL_ACK: |
| printf("RA:%s ", |
| etheraddr_string(((const struct ctrl_ack_t *)p)->ra)); |
| break; |
| case CTRL_CF_END: |
| printf("RA:%s BSSID:%s ", |
| etheraddr_string(((const struct ctrl_end_t *)p)->ra), |
| etheraddr_string(((const struct ctrl_end_t *)p)->bssid)); |
| break; |
| case CTRL_END_ACK: |
| printf("RA:%s BSSID:%s ", |
| etheraddr_string(((const struct ctrl_end_ack_t *)p)->ra), |
| etheraddr_string(((const struct ctrl_end_ack_t *)p)->bssid)); |
| break; |
| default: |
| printf("(H) Unknown Ctrl Subtype"); |
| } |
| } |
| |
| static int GetHeaderLength(u_int16_t fc) |
| { |
| int iLength=0; |
| |
| switch (FC_TYPE(fc)) { |
| case T_MGMT: |
| iLength = MGMT_HEADER_LEN; |
| break; |
| case T_CTRL: |
| switch (FC_SUBTYPE(fc)) { |
| case CTRL_PS_POLL: |
| iLength = CTRL_PS_POLL_LEN; |
| break; |
| case CTRL_RTS: |
| iLength = CTRL_RTS_LEN; |
| break; |
| case CTRL_CTS: |
| iLength = CTRL_CTS_LEN; |
| break; |
| case CTRL_ACK: |
| iLength = CTRL_ACK_LEN; |
| break; |
| case CTRL_CF_END: |
| iLength = CTRL_END_LEN; |
| break; |
| case CTRL_END_ACK: |
| iLength = CTRL_END_ACK_LEN; |
| break; |
| default: |
| iLength = 0; |
| break; |
| } |
| break; |
| case T_DATA: |
| if (FC_TO_DS(fc) && FC_FROM_DS(fc)) |
| iLength = 30; |
| else |
| iLength = 24; |
| break; |
| default: |
| printf("unknown IEEE802.11 frame type (%d)", |
| FC_TYPE(fc)); |
| break; |
| } |
| |
| return iLength; |
| } |
| |
| /* |
| * Print the 802.11 MAC header |
| */ |
| static inline void |
| ieee_802_11_print(u_int16_t fc, const u_char *p, u_int length) |
| { |
| switch (FC_TYPE(fc)) { |
| case T_MGMT: |
| mgmt_header_print(p, length); |
| break; |
| |
| case T_CTRL: |
| ctrl_header_print(fc, p, length); |
| break; |
| |
| case T_DATA: |
| data_header_print(fc, p, length); |
| break; |
| |
| default: |
| printf("(header) unknown IEEE802.11 frame type (%d)", |
| FC_TYPE(fc)); |
| break; |
| } |
| } |
| |
| /* |
| * This is the top level routine of the printer. 'p' is the points |
| * to the ether header of the packet, 'h->tv' is the timestamp, |
| * 'h->length' is the length of the packet off the wire, and 'h->caplen' |
| * is the number of bytes actually captured. |
| */ |
| void |
| ieee802_11_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) |
| { |
| u_int caplen = h->caplen; |
| u_int length = h->len; |
| u_int16_t fc; |
| u_int HEADER_LENGTH; |
| u_short extracted_ethertype; |
| |
| ++infodelay; |
| ts_print(&h->ts); |
| |
| if (caplen < IEEE802_11_FC_LEN) { |
| printf("[|802.11]"); |
| goto out; |
| } |
| |
| fc=EXTRACT_LE_16BITS(p); |
| |
| if (eflag) |
| ieee_802_11_print(fc, p, length); |
| |
| /* |
| * Some printers want to get back at the ethernet addresses, |
| * and/or check that they're not walking off the end of the packet. |
| * Rather than pass them all the way down, we set these globals. |
| */ |
| packetp = p; |
| snapend = p + caplen; |
| |
| HEADER_LENGTH=GetHeaderLength(fc); |
| |
| length -= HEADER_LENGTH; |
| caplen -= HEADER_LENGTH; |
| p += HEADER_LENGTH; |
| |
| switch (FC_TYPE(fc)) { |
| case T_MGMT: |
| if (!mgmt_body_print(fc, (const struct mgmt_header_t *)packetp, |
| p, length)) { |
| printf("[|802.11]"); |
| goto out; |
| } |
| break; |
| |
| case T_CTRL: |
| if (!ctrl_body_print(fc, p - HEADER_LENGTH, |
| length + HEADER_LENGTH)) { |
| printf("[|802.11]"); |
| goto out; |
| } |
| break; |
| |
| case T_DATA: |
| /* There may be a problem w/ AP not having this bit set */ |
| if (FC_WEP(fc)) { |
| if (!wep_print(p,length)) { |
| printf("[|802.11]"); |
| goto out; |
| } |
| } else { |
| if (llc_print(p, length, caplen, packetp + 10, |
| packetp + 4, &extracted_ethertype) == 0) { |
| /* |
| * Some kinds of LLC packet we cannot |
| * handle intelligently |
| */ |
| if (!eflag) |
| ieee_802_11_print(fc, p - HEADER_LENGTH, |
| length + HEADER_LENGTH); |
| if (extracted_ethertype) { |
| printf("(LLC %s) ", |
| etherproto_string(htons(extracted_ethertype))); |
| } |
| if (!xflag && !qflag) |
| default_print(p, caplen); |
| } |
| } |
| break; |
| |
| default: |
| printf("(body) unhandled IEEE802.11 frame type (%d)", |
| FC_TYPE(fc)); |
| break; |
| } |
| |
| if (xflag) |
| default_print(p, caplen); |
| out: |
| putchar('\n'); |
| --infodelay; |
| if (infoprint) |
| info(0); |
| } |